JPH09287749A - Control equipment of floor heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a rise of floor temperature and to reduce noise in the initial period of operation. SOLUTION: The amount of combustion of a burner 100 is controlled so that a detected temperature of a high temperature water thermistor 401 be 85 deg.C until the detected temperature of a low temperature water thermistor 402 reaches 65 deg.C and that the detected temperature of the low temperature water thermistor 402 be 65 deg.C after the detected temperature of this thermistor 402 reaches 65 deg.C. Since the burner 100 is controlled on the basis of the detected temperature of the high temperature water thermistor 401 during the time when the temperature of hot water going to a floor is low, a sufficient quantity of heat can be given, a hot water temperature in a heat exchanger 11 for heating is prevented from rising excessively and extinguishing of fire of the burner 100 for preventing overheat is not made. Repetition of ignition and extinction of the burner 100 does not occur and so noise is not generated. After the detected temperature of the low temperature water thermistor 402 reaches 65 deg.C, the control of the amount of combustion of the burner 100 is conducted on the basis of the detected temperature of this thermistor 402 and, therefore, the temperature of the hot water going to the floor is stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a hot water circulation circuit by connecting a heat exchanger having a heating source to a pump, and branches the pump discharge side and suction side of the hot water circulation circuit. The present invention relates to a floor heating system control device in which a floor hot water circuit is formed to a floor heating panel arranged on the floor of a room.

[0002]

2. Description of the Related Art In a floor heating system in which a floor heating panel equipped with a hot water pipe is arranged on the floor surface and hot water is circulated through the floor heating panel, in order to ensure a sufficient amount of heat radiation and to stabilize the floor surface temperature. In addition, the heating source, for example, hot water heated by a heat exchanger equipped with a burner is not directly supplied to the floor heating panel, but hot water obtained by mixing high temperature hot water and low temperature hot water returned from the floor heating panel is Supplied to floor heating panels.

In this case, the heating capacity is adjusted by detecting the temperature of hot water supplied to the floor heating panel with a thermistor and controlling the heating amount of the heating source so that the temperature is heated to a constant temperature. This is performed by automatically adjusting the opening time ratio of the shutoff valve arranged in the hot water circulation circuit according to the set heating capacity of the controller operated by the user, and controlling the heat radiation amount in the floor heating panel.

Further, the temperature of the hot water flowing out from the heat exchanger is detected by a thermistor, and the heating source is heated when the temperature exceeds a predetermined limit temperature (eg 89 ° C.) so that the heated hot water does not boil. Is stopped, and when the temperature of the hot water drops to an operating temperature lower than the limit temperature, the heating source is operated again to prevent overheating of the hot water.

[0005]

In the conventional floor heating system having the above structure, when the floor heating operation by the floor heating panel is started, the temperature of the hot water circulating through the floor heating panel is low at the beginning of the operation, so that the heating source. The heating amount is large, and is controlled to, for example, the maximum heating amount. However, the hot water flowing out of the heat exchanger heated by the heating source is not supplied to the floor heating panel as it is, but is mixed with the hot water returning from the floor heating panel (cold water in the initial stage of operation) to lower the temperature of the low temperature water. Is supplied to the floor heating panel. Therefore, the temperature of the hot water supplied to the floor heating panel only gradually rises, and the detection temperature of the thermistor that detects the temperature of the hot water supplied to the floor heating panel does not rise easily. As a result, the maximum heating amount of the heating source is continued, the temperature of the high-temperature hot water heated by the heat exchanger rises remarkably, and finally, as shown in FIG. The limit temperature is reached and the heating source stops operating.

When the temperature of the hot water heated by the heat exchanger decreases due to the deactivation of the heating source, and then becomes lower than the operating temperature lower than the limit temperature, the heating source operates again to heat the hot water passing through the heat exchanger. However, similarly to the above, when the temperature of the hot water reaches the limit temperature again, the operation of the heating source is stopped, and thereafter, the operation and stop of the heating source are repeated until the floor going temperature reaches the above-mentioned constant temperature. As a result, the amount of heat of hot water supplied to the floor heating panel when the heating source is stopped is reduced, and the temperature of the floor heating panel that has risen when the heating source is activated cannot be maintained, so the rise of the floor temperature is delayed. There's a problem. Further, for example, when the heating source is configured by a combustion device such as a gas burner, when repeating the operation and stop,
Since the ignition and extinguishing of the burner are repeated, there is a problem that the operating noise of each gas solenoid valve and the ignition noise of the burner are generated as noise.

The present invention rapidly raises the temperature of the floor,
An object of the present invention is to provide a control device for a floor heating system that can improve the rise of the floor temperature and can suppress the generation of noise at the beginning of operation when a burner or the like is used as a heating source.

[0008]

According to a first aspect of the present invention, a heat exchanger having a heating means is connected to a pump to form a hot water circulation circuit, and the pump of the hot water circulation circuit is discharged. A floor heating system that forms a floor hot water circuit to a floor heating panel arranged on the floor of the room by branching each of the suction side and the suction side, for detecting the hot water temperature heated by the heat exchanger. A heating temperature sensor is provided on the outflow side of the heat exchanger, and a floor going temperature sensor for detecting the floor going hot water temperature is provided on the hot water supply side to the floor heating panel of the floor hot water circuit. While preventing overheating of hot water in the hot water circulation circuit based on the detected temperature, in the controller of the floor heating system for controlling the heating amount of the heating means based on the detected temperature of the floor going temperature sensor, After the heating of the heating means is started, the temperature detected by the heating temperature sensor becomes the second predetermined temperature higher than the first predetermined temperature until the temperature detected by the floor going temperature sensor reaches the first predetermined temperature. The heating amount of the heating means is controlled as described above, and after the detection temperature of the floor going temperature sensor reaches the first predetermined temperature, the detection temperature of the floor going temperature sensor becomes the first predetermined temperature. The technical means is to control the heating amount of the heating means.

With the above structure, when the floor heating operation is started and the pump operates, in the hot water circulation circuit, water is discharged from the pump toward the heat exchanger and also toward the floor heating panel. The water that has passed through the floor heating panel is mixed with the hot water that has been heated after passing through the heat exchanger, and is again discharged from the pump. Since the heat exchanger is heated by the heating means, the water in the hot water circulation circuit is heated when passing through the heat exchanger and the temperature rises. At this time, the water in the floor hot water circuit toward the floor heating panel is a mixture of the hot water heated in the hot water circulation circuit and the return water from the floor heating panel, so the temperature of the floor hot water circuit is It is lower than the temperature of hot water heated in the circulation circuit.

On the other hand, the heating amount of the heating means for heating the heat exchanger is determined by the heating temperature sensor until the temperature detected by the floor going temperature sensor toward the floor heating panel reaches the first predetermined temperature. Is controlled to a second predetermined temperature higher than the first predetermined temperature, for example, the maximum limiting temperature capable of preventing overheating. Therefore, the heating means gives a heating amount to the hot water in the hot water circulation circuit so that the hot water reaches a limit temperature at which it can be safely heated.
That is, in the heating means, the maximum amount of heat that can be given to the hot water in the hot water circulation circuit is continuously given.

Therefore, the temperature of the water in the floor hot water circuit rises rapidly by being mixed with the hot water in the hot water circulation circuit that is made as high as possible, and the temperature detected by the floor going temperature sensor is the first predetermined value. Until the temperature reaches the temperature, the temperature of the hot water in the hot water circulation circuit is controlled so as to reach the second predetermined temperature and does not decrease, so that the temperature of the floor heating panel reliably increases without a period of decreasing. . As a result, the heating capacity of the heating means is fully utilized, and the temperature of the floor heating panel rises quickly in a short time. After the temperature detected by the floor-going temperature sensor reaches the first predetermined temperature, the heating amount of the heating means is controlled to be maintained at this temperature. Therefore, the floor hot water temperature supplied to the floor heating panel of the floor hot water circuit becomes stable.

According to a second aspect of the present invention, in the first aspect, the hot water heated by the heat exchanger is branched from the outflow side of the heat exchanger and the return side of the floor hot water circuit from the floor heating panel. The indoor hot water circuit provided with an indoor radiator for circulating and radiating heat in the room is provided in parallel, and the floor hot water circuit is provided with a control valve for adjusting the circulating amount of hot water, which is operated by the user. A technical means is provided with a floor heat radiation amount control means for controlling the control valve based on the set heating ability of the heating ability setting means to control the heat radiation amount of the floor heating panel. With this configuration, in the second aspect, the amount of heat radiation in the floor heating panel is determined by the temperature of the supplied hot water and the flow rate thereof. Therefore, after the temperature detected by the floor going temperature sensor reaches the first predetermined temperature, When controlling the heating amount of the heating means so that the detected temperature of the forward temperature sensor becomes the first predetermined temperature, the flow rate of hot water flowing through the floor hot water circuit is adjusted according to the set heating capacity set by the heating capacity setting means. As a result, the amount of heat corresponding to the set heating capacity can be released. At this time, since the temperature is controlled to the first predetermined temperature supplied to the floor heating panel of the floor hot water circuit, the floor hot water temperature is stabilized.

According to a third aspect of the present invention, in the second aspect, a shutoff valve for stopping circulation of hot water is provided as the control valve, and the floor heat radiation amount control means controls the heat radiation amount of the floor heating panel for a predetermined time. The technical means is to change the opening time ratio of the shutoff valve in the above. Accordingly, the heat radiation amount of the floor heating panel can be controlled only by the opening time of the shutoff valve in a predetermined time, so that the control of the control valve of the floor hot water circuit can be simplified.

A fourth aspect of the present invention is the technical means according to the third aspect, wherein the open time ratio is set in advance in a plurality of stages. A fifth aspect of the present invention is the technical means according to the fourth aspect, wherein the heating capacity setting means sets the set heating capacity stepwise by identifying the plurality of stages of the opening time ratio of the shutoff valve. And

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described based on the following embodiments. FIG. 1 shows an embodiment of a hot water heating type air conditioner system according to the present invention. In FIG. 1, 1
Is an outdoor unit having a heating source and a cooling source and installed outdoors, 2
Is an indoor unit arranged on the wall above the room, and is connected to the outdoor unit 1 by a hot water pipe and a cooling pipe.
Is a floor heating panel which has hot water pipes for heat radiation and is arranged on the floor surface in the room, and is connected to the outdoor unit 1 by the hot water pipes. The outdoor unit 1, the indoor unit 2, the floor heating panel 3, the hot water pipe, and the cooling pipe form a hot water circuit 10 for heating and a refrigeration cycle 20, respectively.

In the outdoor unit 1, as a constitution of the hot water circuit 10, a heating heat exchanger 11, a circulation pump 12 driven at a constant rotation, a floor warming valve 13, and a needle are driven by a stepping motor to change the flow rate. A variable flow valve 14, a pressure tank 15, and a flow sensor 18 to be controlled are provided, and a gas burner 100 as a heating source is provided. The refrigeration cycle 20 is provided with a compressor 21, a condenser 22, a strainer 23, and a capillary tube 24, which are driven by an inverter-controlled motor to compress Freon gas that is a refrigerant, and the condenser 22 has a radiating fan 26. Is provided. The floor warming valve 13 is a shut-off valve provided as a control valve of the present invention, which controls opening and closing by heat, and although it takes time to open and close, a large operating force is required when stopping circulation of hot water. Thus, the hot water circulation circuit can be reliably closed.

The indoor unit 2 is provided with a heating heat exchanger 16 as a component of the hot water circuit 10, and a cooling heat exchanger 25 as a component of the refrigeration cycle 20.
Convection fan 2 for circulating indoor air for 6,25
00 is provided and the indoor air is cooled by the heat exchanger 25 for cooling.
→ Pass through the heat exchanger 16 for heating in this order, and send it out to the room again.

In the outdoor unit 1, the indoor unit 2 and the floor heating panel 3, in the hot water circuit 10, the inflow side of the heating heat exchanger 11 is connected to the discharge side of the circulation pump 12, and the outflow side of the heating heat exchanger 11 is connected. Is connected to the inflow side of the heating heat exchanger 16 of the indoor unit 2 via the flow rate variable valve 14 and the flow rate sensor 18. Inflow side of heat exchanger 11 for heating and circulation pump 1
The hot water pipe is branched between the two discharge sides, and the branched hot water pipe is connected to the inflow side of the floor heating panel 3 via the floor heating valve 13. The hot water pipe on the outflow side of the heating heat exchanger 16 and the hot water pipe on the outflow side of the floor heating panel 3 join together and are connected to the suction side of the circulation pump 12 via the pressure tank 15.

The hot water pipe is branched on the outflow side of the heat exchanger 11 for heating, bypasses the indoor unit 2 and the floor heating panel 3, and a small amount of high-temperature hot water is circulated from the heat exchanger 11 for heating to a circulation pump. It is a bypass pipe 17 for direct return to 12, and the outflow side of the bypass pipe 17 is connected to the suction side of the circulation pump 12 and joins with the outflow side of the pressure tank 15.

In the hot water circuit 10 having the above structure, the circulation pump 12 is mainly operated to operate the circulation pump 12 →
Heat exchanger 11 for heating → Flow rate variable valve 14 → Flow rate sensor 18
-> Heat exchanger 16 for heating-> pressure tank 15-> a circulation circuit of the circulation pump 12 forms a high-temperature water circulation circuit for circulating the high-temperature water in the heat exchanger 11 for heating which has been heated to a high temperature by the burner 100, and circulates it. Pump 12 →
A low-temperature water circulation circuit that circulates the low-temperature water returned to the circulation pump 12 is formed by the circulation circuit of the floor warming valve 13 → floor heating panel 3 → pressure tank 15 → circulation pump 12. Further, the high-temperature water in the heating heat exchanger 11 heated by the burner 100 also circulates in the circulation circuit of the circulation pump 12 → the heating heat exchanger 11 → the bypass pipe 17 → the circulation pump 12, and the floor heating panel 3 The hot water in the low temperature water circulation circuit that circulates to is heated.

On the other hand, in the refrigeration cycle 20, the CFC refrigerant circulates through the refrigerant compressor 21 → condenser 22 → strainer 23 → capillary tube 24 → cooling heat exchanger 25 → refrigerant compressor 21, and the refrigerant is circulated during the circulation. Is in the vapor phase in the condenser 22 →
The state of the liquid phase is changed to release heat, and the heat exchanger 25 for cooling changes the state of the liquid phase (fog) to the vapor phase to absorb heat and cool the indoor air.

The control device 400 controls various operations by a microcomputer according to the remote controller 4 operated by the user, and the main part is provided in the outdoor unit 1.
In the indoor unit 2, a receiving unit for receiving an infrared operation signal of the remote controller 4, a detecting unit for performing detection by various sensors provided in the indoor unit 2, a driving unit for driving the convection fan 200, A communication unit that communicates control signals between each unit of the indoor unit 2 and the main unit of the outdoor unit 1 is provided. Also, in the main part, a burner 1 that uses gas as fuel
In addition to the microcomputer for main operation including heating operation such as combustion control of No. 00, a cooling microcomputer for controlling the operation of the compressor 21 of the refrigeration cycle 20 in the cooling operation and the dehumidifying operation is separately provided.

The control device 400 has a high temperature water thermistor (Th1) 401 on the outflow side of the heat exchanger 11 for heating, a discharge side of the circulation pump 12 and a floor warming valve 13 for performing various controls. Low temperature water thermistor (Th2) 40 between
2. An indoor hot water thermistor 403 is provided on the outflow side of the heating heat exchanger 16 of the indoor unit 2, an indoor freezing thermistor 404 is provided on the cooling heat exchanger 25, and a room temperature thermistor 405 and a humidity sensor 406 are provided on the indoor unit 2.

In the hot water heating type air-conditioning system having the above structure, the controller 400 controls the single heating operation by the indoor unit 2 only, the floor single operation by the floor heating panel 3 only, and the duet heating by the floor heating panel 3 and the indoor unit 2. The operation, the dry operation using only the indoor unit 2, the duet dry operation using the floor heating panel 3 and the indoor unit 2, and the cooling operation using the indoor unit 2 are controlled. Here, the independent heating operation using only the indoor unit 2, the floor independent operation using only the floor heating panel 3, and the duet heating operation using the floor heating panel 3 and the indoor unit 2 will be described below.

[Independent Heating Operation] In the independent heating operation, the room is heated only by the indoor unit 2. In the independent heating operation, the variable flow rate valve 14 is fully opened in response to the ON operation of the heating operation of the remote controller 4, the driving of the circulation pump 12 is started, the combustion of the burner 100 is started, and the target indoor temperature set by the remote controller 4 is set. Ts and room temperature thermistor 4
The target hot water temperature is determined from 58 ° C. to 85 ° C. based on the room temperature Tr detected by the high temperature water thermistor 401.
The combustion amount of the burner 100 is controlled so that the hot water temperature detected by the target hot water temperature becomes the target hot water temperature. Further, the convection fan 200 of the indoor unit 2 is controlled in eight stages in proportion to the combustion amount of the burner 100. At this time, the floor warming valve 13 of the low temperature water circulation circuit is closed.

[Floor-only operation] In the floor-only operation, heating operation is performed only by the floor heating panel 3. In the floor alone operation, the combustion amount of the burner 100 is controlled so that the floor hot water temperature Tf detected by the low temperature water thermistor (Th2) 402 becomes a constant temperature, for example, 65 ° C., and the floor heating valve 13 is opened. The heating capacity is controlled by controlling the ratio of the time and the cutoff time in a cycle of 20 minutes. The floor hot water temperature Tf controlled to a constant temperature can be switched to 50 ° C., 55 ° C., and 60 ° C. other than 65 ° C. by the dip switch.

However, when the temperature of hot water in the floor heating panel 3 is low, or when the circulating amount of hot water to the floor heating panel 3 is small, or when it is stopped, the low temperature water thermistor 402 is used.
Burner 1 based on the hot water temperature detected by (Th2)
If the combustion amount of 00 is simply controlled, the temperature of the hot water in the heat exchanger 11 for heating of the high-temperature water circulation circuit will rise excessively, which may cause boiling. Therefore, in the combustion control, when the detected temperature of the high temperature water thermistor (Th1) 401 becomes 89 ° C. or higher, or the low temperature water thermistor (Th2) 402
If the temperature detected by
Overheat prevention control for stopping the combustion of 0 is performed.

Further, at the beginning of the operation, since the temperature rise in the low temperature water circulation circuit for circulating the hot water to the floor heating panel 3 is gentle, the low temperature water thermistor (T
h2) Floor hot water temperature Tf for which the detected temperature of 402 is determined,
For example, until reaching 65 ° C, a high temperature water thermistor (Th
1) Adjust the burner 10 so that the detected temperature of 401 becomes 85 ° C.
Low temperature water thermistor (Th2) 40
Floor hot water temperature Tf (for example, 65
C.), low temperature water thermistor (Th2) 40
The combustion amount of the burner 100 is controlled so that the detected temperature of No. 2 becomes the determined floor going temperature Tf. As a result, it is possible to prevent the excessive temperature rise of the hot water in the hot water circulation circuit of the hot water circuit 10 and to quickly raise the hot water temperature of the low temperature water circulation circuit.

The combustion control in the floor single operation will be described below with reference to FIG. When the start of the floor heating operation is instructed by the remote controller 4, the burner 100 starts burning in a predetermined sequence (step 100), and the burner 10 starts.
When 0 ignition is detected, high temperature water thermistor (Th1)
The combustion amount is controlled so that the detected temperature of 401 becomes 85 ° C. (step 101). During this combustion amount control, overheat prevention control is performed so that the temperature detected by the high temperature water thermistor (Th1) does not exceed 89 ° C. Should the temperature detected by the high temperature water thermistor (Th1) exceed 89 ° C. (YES in step 102), the burner 100 is extinguished (step 103), and the process waits until the temperature detected by the high temperature water thermistor (Th1) drops to 73 ° C. or lower (step 1).
(NO in 04), as a result of extinguishing the burner 100, if the detected temperature of the high temperature water thermistor (Th1) 401 drops to 73 ° C. or lower (YES in step 104), the process proceeds to step 100, and steps 100 and thereafter are repeated again.

When the temperature detected by the high temperature water thermistor (Th1) 401 does not exceed 89 ° C. during the combustion amount control so that the temperature detected by the high temperature water thermistor (Th1) 401 becomes 85 ° C. (NO in step 102) ), It is determined whether or not the temperature detected by the low temperature water thermistor (Th2) 402 has reached 65 ° C., and if the temperature detected by the low temperature water thermistor (Th2) 402 has not reached 65 ° C. (NO in step 105), the step Repeat 101 and subsequent steps.

In step 105, when the detected temperature of the low temperature water thermistor (Th2) 402 reaches 65 ° C. (YES), the combustion amount control of the burner 100 is changed and the low temperature water thermistor (Th2) 402 detects it. The combustion amount is controlled so that the temperature of the hot water going to the floor becomes 65 ° C (step 106).

While the burner 100 is controlling the combustion amount based on the temperature detected by the low temperature water thermistor (Th2) 402, in order to prevent the excessive temperature rise of the hot water in the high temperature water circulation circuit, the high temperature water thermistor ( Th1) 401 detected temperature exceeds 89 ° C or low temperature water thermistor (Th
2) Determine whether the detected temperature of 402 exceeds 77 ° C,
If either detected temperature exceeds each condition temperature (YES in step 107), the burner 100 is extinguished (step 108), and the detected temperature of the thermistor exceeding the condition temperature is the high temperature water thermistor (Th1) 401. In the case of No. 1, wait until the detected temperature falls below 80 ° C., and in the case of the low temperature water thermistor (Th2) 402, wait until the detected temperature falls below 53 ° C.
O), as a result of extinguishing the burner 100, the detection temperature of the high temperature water thermistor (Th1) 401 becomes 80 ° C. or lower, or the detection temperature of the low temperature water thermistor (Th2) 402 becomes 53 ° C.
When the value drops below (YES in step 109),
The process proceeds to step 100, and step 100 and subsequent steps are repeated again.

On the other hand, in the heating capacity control of the floor heating panel 3, the opening time (closed time in parentheses) of the floor heating valve 13 in the 20-minute cycle is set by the remote controller 4 as shown in Table 1. The basic speed is 20 minutes (0 minutes) at the maximum floor heating level of speed 7, 3 minutes (17 minutes) at the minimum floor heating level of speed 1, and each speed 6 at the floor heating level in the meantime. For ~ 2, 16 to 6 minutes (4
Each opening time (breaking time) of up to 14 minutes is set.

[0034]

[Table 1]

When the room temperature Tr at the time of starting the floor heating operation is lower than 20 ° C., the basic speed is set to a high speed regardless of the basic speed set as the floor heating level set in the remote controller 4 as a start correction. The operation is started with the expression 7, and the basic speed is reduced by one every 20 minutes after the operation is started until the set speed of the floor heating level set by the remote controller 4 is reached. This will improve the start-up. The variable flow valve 14 is closed in the floor-only operation.

According to the present invention, as shown in FIG. 3, by performing the above-mentioned respective controls, the temperature heated by the heat exchanger 11 for superheating is as high as 85 ° C. while the temperature of the hot water flowing to the floor is low. Since the combustion amount of the burner 100 is controlled so that it becomes, a sufficiently large amount of heat can be given to the high temperature water circulation circuit. Thereby, a large amount of heat is supplied also to the low temperature water circulation circuit. Therefore, a sufficiently large amount of heat can be supplied to the floor heating panel 3, and the rise of the temperature rise of the floor heating panel 3 can be improved.

At this time, the combustion amount of the burner 100 is controlled on the basis of the temperature detected by the high temperature water thermistor 401, so that the hot water in the heating heat exchanger 11 will not be overheated, and the burner 100 will be heated due to overheating. Since the combustion is not stopped, the problem that the temperature of the hot water supplied to the floor heating panel 3 is temporarily lowered does not occur.
As a result, the temperature of the floor heating panel 3 which has once risen is not lowered by the low temperature water or water generated when the burner 100 extinguishes, and the temperature of the floor heating panel 3 can be reliably raised. Also, the low temperature water thermistor 402
After the detection temperature of the low temperature water thermistor 402 reaches 65 ° C., the combustion amount of the burner 100 is controlled to 65 degrees.
Since the temperature is controlled to be 0 ° C., hot water with a stable hot water temperature can be supplied to the floor heating panel 3.

[Duet heating operation] In the duet heating operation, the indoor unit 2 and the floor heating panel 3 heat the room. In the duet heating operation, with respect to the floor heating panel 3, when the room temperature Tr detected by the room temperature thermistor 405 at the start of operation is less than 20 ° C., the rise correction control is performed as in the case of the floor single operation described above. The combustion amount control after the ignition of the burner 100 is performed by detecting the high temperature water temperature by the high temperature water thermistor 401 provided on the outflow side of the heating heat exchanger 11,
The combustion amount of the burner 100 is feedback-controlled so as to be 0 ° C.

As the hot water control for the indoor unit 2, the required heat quantity Q to be released into the room is calculated based on the set temperature Ts of the remote controller 4 and the indoor temperature Tr detected by the room temperature thermistor 405 provided in the indoor unit 2. Then, the flow rate variable valve 14 is controlled so that the hot water flow rate L such that the required heat quantity Q is radiated by the heating heat exchanger 16 of the indoor unit 2 is obtained. Note that, for example, when the opening degree of the flow rate variable valve 14 is reduced in order to reduce the flow rate to the heating heat exchanger 16, the flow rate to the bypass pipe 17 increases, so the flow rate to the floor heating panel 3 (for heating Bypass pipe 1 to the flow rate flowing through the heat exchanger 16
The flow rate through 7) does not change. That is, even if the opening degree of the flow rate variable valve 14 changes, the flow rate to the floor heating panel 3 does not change.

Although the flow rate to the floor heating panel 3 does not change in this way, since the temperature of the hot water supplied to the floor heating panel 3 changes, in the floor heating hot dash operation in duet heating operation, the high temperature water thermistor is used. Combustion control is performed so that the temperature detected by 401 becomes 80 ° C., which is different from that during the single floor operation.

The amount of heat radiated in the heating heat exchanger 16 depends on the temperature difference between the inflow hot water temperature Tin flowing into the heating heat exchanger 16 and the outflow hot water temperature Tout flowing out from the heating heat exchanger 16, and Q = L × (Tin−Tout) Equation 1 is obtained from the flow rate L of hot water flowing through the heat exchanger 16, and therefore the hot water flow rate L is determined by L = Q / (Tin−Tout) Equation 2. Therefore, when the required heat quantity Q is calculated, if the inflow warm water temperature Tin and the outflow warm water temperature Tout are detected, the warm water flow rate L can be calculated by the above equation 2, and the calculated warm water flow rate L can be obtained. The variable flow valve 14 may be controlled.

By the above control operation, the heat radiation amount in the heating heat exchanger 16 of the indoor unit 2 can be accurately controlled, and even if the floor heating panel 3 is used for heating at the same time, more accurate heating operation can be performed. It can be carried out.

In each of the above operations, the burner 10
As the combustion control of 0, the pre-purge is performed by the combustion fan 101 according to the ON operation of each operation, and then the solenoid valves 102, 103 and the proportional valve 104 are controlled in a predetermined sequence to supply the fuel to the burner 100. Then, ignition control is performed to generate a spark discharge at the ignition electrode 105 and start combustion.
After detection of ignition by the flame rod 106, the combustion fan 101 and the proportional valve 104 are controlled to control the combustion amount of the burner 100. After the operation is completed, the burner 100
By stopping the operation of the circulation pump 12 two minutes after the combustion is stopped, the heating operation can be smoothly stopped by utilizing the residual heat.

In the above embodiment, the floor warming valve is shown as the shutoff valve, and the opening ratio is controlled by changing the duty ratio of ON and OFF. However, the energizing current is changed by using the proportional valve. Therefore, the open ratio may be controlled. In the above embodiment, the freezing refrigeration cycle 2
Although 0 is provided to perform the cooling operation, the cooling operation may not be performed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hot water air conditioner system showing an embodiment of the present invention.

FIG. 2 is a flow chart for explaining a combustion amount control operation in a floor single operation in the embodiment of the present invention.

FIG. 3 is a characteristic diagram showing a change in detected temperature of each thermistor due to combustion amount control in a floor single operation in the embodiment of the present invention.

FIG. 4 is a characteristic diagram showing changes in detected temperature of each thermistor due to combustion amount control in a conventional floor heating system.

[Explanation of symbols]

10 Hot Water Circuit (Hot Water Circulation Circuit Floor Hot Water Circuit Indoor Hot Water Circuit) 11 Heating Heat Exchanger (Heat Exchanger) 12 Circulation Pump (Pump) 13 Floor Heating Valve (Control Valve) 16 Heating Heat Exchanger (Indoor Radiation) 100 burner (heating means) 3 floor heating panel 4 remote control (heating capacity setting means) 400 control device (control device for floor heating system, floor radiation combustion amount control device) 401 high temperature water thermistor (heating temperature sensor) 402 low temperature water Thermistor (floor temperature sensor)

Claims (5)

[Claims] 1. A floor in a room in which a heat exchanger having heating means is connected to a pump to form a hot water circulation circuit, and the discharge side and suction side of the pump of the hot water circulation circuit are branched from each other. A floor heating system that forms a floor hot water circuit to a floor heating panel arranged on a surface, wherein a heating temperature sensor for detecting the temperature of hot water heated by the heat exchanger is provided on the outflow side of the heat exchanger. Along with, a floor-going temperature sensor that detects a bed-going hot water temperature is provided on the hot-water supplying side to the floor heating panel of the floor hot-water circuit, and hot water in the hot-water circulating circuit is based on the temperature detected by the heating temperature sensor. In a controller for a floor heating system that prevents overheating and controls the heating amount of the heating means based on the temperature detected by the floor going temperature sensor, in the heating device, after starting heating of the heating means, the floor going temperature. Until the temperature detected by the sensor reaches a first predetermined temperature to control the heating amount of said heating means so that the detected temperature of the heating temperature sensor is the first higher than the predetermined temperature a second predetermined temperature,
After the temperature detected by the floor going temperature sensor reaches the first predetermined temperature, the heating amount of the heating means is controlled so that the temperature detected by the floor going temperature sensor reaches the first predetermined temperature. A control device for a floor heating system characterized by: 2. The hot water heated by the heat exchanger according to claim 1, wherein the outflow side of the heat exchanger and the return side of the floor hot water circuit from the floor heating panel are respectively branched. In parallel with the indoor hot water circuit provided with an indoor radiator for radiating heat indoors, the floor hot water circuit is provided with a control valve for adjusting the circulation amount of hot water,
A floor heating system comprising floor heat radiation amount control means for controlling the control valve based on the set heating ability of the heating ability setting means operated by the user to control the heat radiation amount of the floor heating panel. Control device. 3. The control valve is a shutoff valve for stopping circulation of hot water, and the floor heat radiation amount control means controls the heat radiation amount of the floor heating panel in an opening time ratio of the shutoff valve at a predetermined time. 3. The method according to claim 2, wherein
Controller for the underfloor heating system described. 4. The control device for a floor heating system according to claim 3, wherein the opening time ratio is preset in a plurality of stages. 5. The heating capacity setting means sets the set heating capacity stepwise by identifying the plurality of stages of the opening time ratio of the shutoff valve. Control device for floor heating system.